[Original development concept]
- Type 2189E (75W140) delivers the same dynamic viscosity as a 190 grade oil while providing a base grade of 75W. It is an ester compound, 100% synthetic oil, with outstanding low temperature properties.
- An oil with a viscosity (or hyper-viscosity) of 190 has greater resistance to stirring and this raises oil temperatures. But at the same time, without hyper-viscosity, the maintaining of film strength at high temperatures is impossible.
- The basic development concept for Type 2189E (75W190) Competition Motor Oil was to keep the benefits of hyper-viscosity while seeking to diminish resistance to stirring.
* How about a 250 grade oil?
Generally, 250 grade oil achieves hyper-viscosity through the use of additives. Once it is run at high temperatures exceeding 150℃, this viscosity will decrease. After the first temperature peak and cool-down, its actual dynamic viscosity will have fallen to a 140 grade and continue to be so. This is why NISMO and MOTUL chose not to use 250 grade oil.
[Superior dynamic viscosity]
- Because this oil’s internal friction does not vary greatly with changes in temperature, LSD operation will remain stable. Even when racing, the driver should feel no change in performance. 75W140 Competition Oil has also shown excellent plate anti-judder properties.
- Performance at a NISSAN GT-R(R35) road test carried out by NISSAN MOTOR Co., Ltd on the Nurburgring track clearly demonstrated the stabilizing effect of 75W140 Competition Oil on LSD operation. Drivers reported specifically that “the chattering of the LSD was reduced”.
- From the outset of their development of Competition Motor Oils, including the original Veruspeed LSD Oil (no longer marketed), NISMO and MOTUL have run both test course and racing circuit tests on their samples, using current benchmark oils as controls. In order to check for stick-slip chattering, sample oils were brought up to 150℃ where their lubrication properties are lost. *1
- NISMO and MOTUL have modeled their evaluation tests to recreate every aspect of the high-load environment in which the oil will be used. In one test series, lubricant testing equipment borrowed from the iron manufacturing business was used to evaluate lubrication properties at temperatures up to 230℃. This extreme testing method opened the way to achieving greater stability for dynamic viscosity (μ). Not only were development targets reached but a rich fund of information for future development was accumulated. *2
- Starting with 100% synthetic oil, MOTUL uses its know-how in mixing esters and nitrogen additives. The result is an oil whose viscosity rivals 190 grade oil while retaining excellent flow at cold-start. Its dynamic viscosity is superlative for stable performance.
*1 Testing follows NISMO standards.
*2 Oil temperatures are brought up to approximately 200℃ in actual vehicle testing, but automotive lubricating oil bench tests in the laboratory do not measure temperatures above 150℃.
[ Recommended oil for the Nissan GT-R(R35) ]
- Because Type 2189E (75W140) is the oil recommended by Nissan Motor Company for the Nissan GT-R (R35), its usage is covered by the Nissan GT-R (R35) warranty.
- Please change your motor oil after 3,000 kilometers of high performance driving or 10,000 kilometers of normal road use. When using this oil, LSD efficiency will be greatly increased (with especially good high-speed performance), but there will also be greater wear on the LSD’s internal clutch plates. Please be aware of this before purchase.
For more information please visit the NISMO Competition Oil Site: http://www.nismo.co.jp/en/products/competition/of/competition_oil/lineup/75w140.html